Elastic band directly put on the seat Multi-purpose,can be placed in the car can also be placed in the office to ease the pressure you are driving and working. mesh wrapped outside the framework of black,smooth to the touch,easy to clean. Four weeks framework high elasticity wire border,flexible,maintain the same shape This product is 2 layers of fabric,the bottom of the Black Dragon nylon material,the top massage beads produced very practical. Lumbar support in cars is a way to aid both drivers and passengers while sitting in car seats. They are meant to correct poor posture which has resulted in doctors treating an alarming number of patients with lower back pain. Instead of having slumped posture,drivers and passengers can now use lumbar support to sit up straight and gain many health benefits from proper posture.